In the city called Ankh-Morpork, modern technology has made great progress. People gradually forget the traditional postal system and turn to the more convenient and fast Internet Clarks. But Clarks is not stable. Due to frequent system crashes, the speed of network transmission is getting slower and slower. The lord of Ankh-Morpork, Vetinari (Charles Dance), can no longer tolerate Clarks' tyranny and slowness. He decides to serve the collapsed traditional postal system. Vetinari locks the best candidate for the revival of the postal service on Maurest van Leeweg (Richard Coyle). This is a shrewd and cunning little liar. Vetinari took down Maurest, who was about to be hanged, at the critical moment and appointed him as the director of the post office. Maurest could not escape, so he had to lead a group of old and weak soldiers to fight against Clarks... This film is adapted from Terry Pratchett's novel of the same name.